Carburetor-control mechanism



w. B. BARNES 1,769,099

GARBURETOR CONTROL, MECHANISM Filed June 2, 1927 2 Sheets-Sheet 1 .IF. I

July 1, 1930. w. B. BARNES GARBURE'IOR CONTROL uacnmsu' 2 Sheath-Sheet 2 Filed June 2. 1927 I III Patented July 1, 1930 UNITED STATES PATENT OFFICE WILLIAM B. BARNES, F AUBURN, INDIANA, ASSIGNOR T0 INTERNATIONAL HAB- VESTER COMPANY, A CORPORATION OF NEW JERSEY GARBURETOR-CONTROL MECHANISM Application filed June 2, 1927. Serial No. 195,912.

This invention relates to improvements in the control mechanism for internal combustion engines, and more particularly to an improved enclosed governor and carburetor control for such an engine.

It is an object of the invention to provide an enclosed control system connecting a governor and a carburetor in such a manner that the control system may be accurately varied to suit different conditions without the removal of any of the parts of the system.

Another object of the invention is to provide an improved throttle stop for the throttle of a carburetor.

Other objects of the invention will appear as the following description proceeds.

In the accompanying drawings, an illustrative control system is shown. In the drawings, 1

Figure 1 is a side elevation of an internal combustion engine equipped with the illustrated control system;

Figure 2 is a plan view of the engine and the system shown in Figure 1;

Figure 3 is an elevation of the carburetor with the illustrative throttle stop applied thereto;

Figure 4 is a horizontal section, showing the connections between the throttle rod and its operating shaft; and

Figure 5 is a perspective view of the con- 7 necter which forms a part of the illustrative throttle stop. 1

In the drawlngs, an internal combustion engine 10 having a cylinder head 11 and a manifold 12 is shown. The manifold is preferably an integral casting forming a support for the carburetor 13. The carburetor has its throttle connected with a governor 14 of a suitable type located in the governor housing 15 at the forward portion of the. engine. This governor is connected with a rotating part of the engine as desired, and it is arranged to control the positions of the carburetor throttle through connecting rods housed within the casings 16 and 17 These casings are preferably in tubular form, as shown, and are joined by a housing 18 located at one corner of the engine. Within'the housing 18 the connecting shafts are related in such a man:

ner that the throttle shaft19 may be con- 1 trolled independently of the governor 15, by means of such connections as the rods 20 and 21 leading to a handle 22 supported on the instrument board 23 in a position where it will be convenient and accessible to the operator of a vehicle driven by the engine. The carburetor illustrated in Figures 3 and l of the drawings comprises a fuel bowl 24,

the mixing chamber 25, and the explosive mixture outlet 26. The airintake 27 is connected with the space in the carburetor above the fuel by means of a tube 28, in a manner which is described and shown in the E11- sign Patent 1,064,627. Within the fuel outlet 26, the usual throttle valve 29 is pivotally mounted through the rotative mounting of the throttle rod 30 journaled transversely of the fuel outlet. The valve 29 is preferably in the form of a circular disk pinned to the rod 30, as illustrated at 31.

Within the casting which forms the fuel outlet 26 a cylindrical bore 32 is made. This bore receives the connecter 33 so as to rotatively mount the latter. The con-.

necter is mountedupon an extension 3 1 of the throttle rod and is preferably fixed thereto by a pin 35.

At one endthe connector 33 is provided with opposite lugs 36and 37 received within correspondingly shaped notches 38 formed within the head 39, which is connected to and fixed with relation to the throttle shaft 19.

The fully open position and the fully closed position of the throttle 29 are determined by the positions of stops to and 41, herein shown as parts of screw-threaded bolts 42 and 4.3, respectively. The inner ends of these stops extend within the bore 32 so as to be located in the paths of movement of the ends of the arcuate extension 44: of the connecter 33. Preferably the bolt 42 forming the stop 40 is surrounded by an expansion spring 45, which assists in the maintaining of the stop at any desired position.

While the invention has been described with reference to a particular structure, it is to be understood that it is not limited thereto, but that it is of a scope commensurate with the breadth of the appended claims.

What is claimed as new is: v

1. A Carburetor comprising, in combination, a member forming a fuel mixture outlet, a throttle valve movably mounted with in said outlet, a throttle rod supporting said valve and rotatively mounted in said member, said member being formed with a bore coaxial with the throttle rod, an extension of the throttle rod extending through said bore, a cylindrical connecter fixed to and movable with said throttle rod positioned within said bore, an extension on said con necter extending only partly around the throttle rod, and movable stops extending within said bore into the path of movement of said extension, said stops being adjustable from positions externally of the carburetor for varying the fully open and fully closed positions of the throttle valve.

2. An enclosed governor control system for internal combustion engines comprising, in combination, a carburetor provided with a throttle valve, an engine operated governor for varying the positions of the throttle valve to control the speed of the engine, a power transmitting shaft operatively connected to the governor, a throttle'rod journaled in the carburetor and carrying said 7 valve said rod being in alignment with the power transmitting shaft, a connecter movable with and operatively oining said throttle rod to said shaft, adjustable stops extending into the path of movement of the connecter for limiting the movement of the same, and housings completely enclosing all of said operative connections and extending from the governor to the carburetor, said stops being accessible at positions externally of said housings.

45 In testimony whereof I affix my signature.

WM. B. BARNES. 

